kernel/linux.git/drivers/char/hw_random, branch linux-4.20.y

hwrng: core - document the quality field

2018-10-05T02:16:56+00:00

quality field is currently documented as being 'per mill'. In fact the math involved is: add_hwgenerator_randomness((void *)rng_fillbuf, rc, rc * current_quality * 8 >> 10); thus the actual definition is "bits of entropy per 1024 bits of input". The current documentation seems to have confused multiple people in the past, let's fix the documentation to match code. An alternative is to change core to match driver expectations, replacing rc * current_quality * 8 >> 10 with rc * current_quality / 1000 but that has performance costs, so probably isn't a good option. Fixes: 0f734e6e768 ("hwrng: add per-device entropy derating") Reported-by: "Dr. David Alan Gilbert" Signed-off-by: Michael S. Tsirkin Signed-off-by: Herbert Xu

Merge tag 'char-misc-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

2018-08-18T18:04:51+00:00

Pull char/misc driver updates from Greg KH: "Here is the bit set of char/misc drivers for 4.19-rc1 There is a lot here, much more than normal, seems like everyone is writing new driver subsystems these days... Anyway, major things here are: - new FSI driver subsystem, yet-another-powerpc low-level hardware bus - gnss, finally an in-kernel GPS subsystem to try to tame all of the crazy out-of-tree drivers that have been floating around for years, combined with some really hacky userspace implementations. This is only for GNSS receivers, but you have to start somewhere, and this is great to see. Other than that, there are new slimbus drivers, new coresight drivers, new fpga drivers, and loads of DT bindings for all of these and existing drivers. All of these have been in linux-next for a while with no reported issues" * tag 'char-misc-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (255 commits) android: binder: Rate-limit debug and userspace triggered err msgs fsi: sbefifo: Bump max command length fsi: scom: Fix NULL dereference misc: mic: SCIF Fix scif_get_new_port() error handling misc: cxl: changed asterisk position genwqe: card_base: Use true and false for boolean values misc: eeprom: assignment outside the if statement uio: potential double frees if __uio_register_device() fails eeprom: idt_89hpesx: clean up an error pointer vs NULL inconsistency misc: ti-st: Fix memory leak in the error path of probe() android: binder: Show extra_buffers_size in trace firmware: vpd: Fix section enabled flag on vpd_section_destroy platform: goldfish: Retire pdev_bus goldfish: Use dedicated macros instead of manual bit shifting goldfish: Add missing includes to goldfish.h mux: adgs1408: new driver for Analog Devices ADGS1408/1409 mux dt-bindings: mux: add adi,adgs1408 Drivers: hv: vmbus: Cleanup synic memory free path Drivers: hv: vmbus: Remove use of slow_virt_to_phys() Drivers: hv: vmbus: Reset the channel callback in vmbus_onoffer_rescind() ...

Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux

2018-08-03T09:55:12+00:00

Merge mainline to pick up c7513c2a2714 ("crypto/arm64: aes-ce-gcm - add missing kernel_neon_begin/end pair").

hwrng: msm - remove msm hw_random driver

2018-07-27T11:04:30+00:00

This driver is for a psedo-rng so should not be added in hwrng. Remove it so that it's replacement can be added. Signed-off-by: Vinod Koul Signed-off-by: Herbert Xu

headers: separate linux/mod_devicetable.h from linux/platform_device.h

2018-07-07T15:52:26+00:00

At over 4000 #includes, is the 9th most #included header file in the Linux kernel. It does not need , so drop that header and explicitly add to source files that need it. 4146 #include After this patch, there are 225 files that use , for a reduction of around 3900 times that does not have to be read & parsed. 225 #include This patch was build-tested on 20 different arch-es. It also makes these drivers SubmitChecklist#1 compliant. Signed-off-by: Randy Dunlap Reported-by: kbuild test robot # drivers/media/platform/vimc/ Reported-by: kbuild test robot # drivers/pinctrl/pinctrl-u300.c Signed-off-by: Greg Kroah-Hartman

hwrng: core - Always drop the RNG in hwrng_unregister()

2018-06-15T15:06:49+00:00

enable_best_rng() is used in hwrng_unregister() to switch away from the currently active RNG, if that is the one currently being removed. However enable_best_rng() might fail, if the next RNG's init routine fails. In that case enable_best_rng() will return an error code and the currently active RNG will remain active. After unregistering this might lead to crashes due to use-after-free. Fix this by dropping the currently active RNG, if enable_best_rng() failed. This will result in no RNG to be active, if the next-best one failed to initialize. This problem was introduced by 142a27f0a731ddcf467546960a5585970ca98e21 Fixes: 142a27f0a731 ("hwrng: core - Reset user selected rng by...") Reported-by: Wirz Tested-by: Wirz Signed-off-by: Michael Büsch Cc: stable@vger.kernel.org Signed-off-by: Herbert Xu

hwrng: n2 - fix spelling mistake: "restesting" -> "retesting"

2018-05-18T16:13:53+00:00

Trivial fix to spelling mistake in dev_err error message Signed-off-by: Colin Ian King Signed-off-by: Herbert Xu

hwrng: stm32 - fix pm_suspend issue

2018-05-05T06:52:49+00:00

When suspend is called after pm_runtime_suspend, same callback is used and access to rng register is freezing system. By calling the pm_runtime_force_suspend, it first checks that runtime has been already done. Signed-off-by: Lionel Debieve Signed-off-by: Herbert Xu

hwrng: stm32 - define default state for rng driver

2018-05-05T06:52:47+00:00

Define default state for stm32_rng driver. It will be default selected with multi_v7_defconfig Signed-off-by: Lionel Debieve Signed-off-by: Herbert Xu

hwrng: via - support new Centaur CPU

2018-04-20T16:59:03+00:00

New Centaur CPU(Family > 6) supprt Random Number Generator, but can't support MSR_VIA_RNG. Just like VIA Nano. Signed-off-by: David Wang Signed-off-by: Herbert Xu